Esso49 Posted July 8, 2018 Share Posted July 8, 2018 Seems not my day as I have a a small Sakari SH1000DX portable generator which up until yesterday worked fine. However now it does not produce electricity. It worked one day and not the next. I tried the tricks I found on google including re-energising using an electric drill but still no joy. Does anyone now of a professional repair shop for portable generators I could take it to ? I searched the web but can not come up with anything either in Udon Thani or Pattaya. Link to comment Share on other sites More sharing options...
Crossy Posted July 8, 2018 Share Posted July 8, 2018 Have you checked the obvious, that the protection breakers haven't popped? They should be in for on (I know, I know, but one has to ask). Any of the small places that sell these beasties should be able to help getting it sorted. Link to comment Share on other sites More sharing options...
Esso49 Posted July 8, 2018 Author Share Posted July 8, 2018 (edited) 6 minutes ago, Crossy said: Have you checked the obvious, that the protection breakers haven't popped? They should be in for on (I know, I know, but one has to ask). Any of the small places that sell these beasties should be able to help getting it sorted. Yes checked all them out. Had the cover off to check for obvious loose connections etc. Had a multi meter on it and it is outputting 2.8 / 2.9 volts on the ac side which, according to the google experts suggests the need to re-energise which as I said didn't work. No one seems to sell this make anymore and this is my problem getting someone to take a look at it. As you may appreciate the 100's of people who staff Global House and Homepro had zero idea of where to take it !! Edited July 8, 2018 by Esso49 Link to comment Share on other sites More sharing options...
Crossy Posted July 8, 2018 Share Posted July 8, 2018 I don't know this unit, but if it's creating some voltage then it ought to liven up. Can you check the brushes? (if it has them) Also is the regulator electronic (probably a sealed box) or a simple capacitor (which you can replace)? Link to comment Share on other sites More sharing options...
Esso49 Posted July 8, 2018 Author Share Posted July 8, 2018 33 minutes ago, Crossy said: I don't know this unit, but if it's creating some voltage then it ought to liven up. Can you check the brushes? (if it has them) Also is the regulator electronic (probably a sealed box) or a simple capacitor (which you can replace)? yes brushes appear ok and as you suspect the regulator is sealed box. No obvious sign of overheating though Link to comment Share on other sites More sharing options...
Crossy Posted July 8, 2018 Share Posted July 8, 2018 Can you get at the field terminals when it's running (the output side of the regulator)? Should be a DC voltage there. I suspect the regulator, there's not really a lot else to go wrong, all you have to do is find one. AliExpress could be your friend. https://aliexpress.com/w/wholesale-avr-for-generator.html?spm=2114.search0104.1.2.482a7edde5w1gX&SearchText=avr+for+generator&initiative_id=RS_20180707192829 Link to comment Share on other sites More sharing options...
Esso49 Posted July 8, 2018 Author Share Posted July 8, 2018 25 minutes ago, Crossy said: Can you get at the field terminals when it's running (the output side of the regulator)? Should be a DC voltage there. I suspect the regulator, there's not really a lot else to go wrong, all you have to do is find one. AliExpress could be your friend. https://aliexpress.com/w/wholesale-avr-for-generator.html?spm=2114.search0104.1.2.482a7edde5w1gX&SearchText=avr+for+generator&initiative_id=RS_20180707192829 ok will check that out when I get back, thanks for your input Link to comment Share on other sites More sharing options...
Esso49 Posted July 15, 2018 Author Share Posted July 15, 2018 On 7/8/2018 at 9:54 AM, Esso49 said: ok will check that out when I get back, thanks for your input Maybe I identified the regulator wrongly. I have attached some pics. Gen 1 pic is the gen end with obviously the cover removed. Is that curved thing at the bottom of the pic the regulator ? there are some wires which appear to go into it but my pic missed them out in bottom right. gen 2 shows the front connections etc. The breakers , bottom tight, are ok. The green power light does not come on yet it does when I connect a dc source both when the power switch , bottom left, is on or off. Normally of course this light is on when running. gen 3 pic is the inside view of pic 2 although not good pic as is sideways on but no heat damage or loose connections to anything be it breakers, ac sockets etc. So now stumped. Link to comment Share on other sites More sharing options...
Crossy Posted July 15, 2018 Share Posted July 15, 2018 The curved aluminium thingy is the regulator. You should be able to get a replacement (similar power, same number of wires). But before you do that:- Check the resistance of the field winding. Check the bridge rectifier. As noted earlier check the voltage on the field with the engine running (DC). If you can't find a manual it's time to start tracing wires through. Link to comment Share on other sites More sharing options...
Esso49 Posted July 15, 2018 Author Share Posted July 15, 2018 1 minute ago, Crossy said: The curved aluminium thingy is the regulator. You should be able to get a replacement (similar power, same number of wires). But before you do that:- Check the resistance of the field winding. Check the bridge rectifier. As noted earlier check the voltage on the field with the engine running (DC). If you can't find a manual it's time to start tracing wires through. Thanks Crossy I'll take it off another day to see if there is any serial numbers etc on it so I can try to get a replacement. Link to comment Share on other sites More sharing options...
Crossy Posted July 15, 2018 Share Posted July 15, 2018 The circuit probably looks something like this From this page http://portable.generatorguide.net/avr.html EDIT have you tried the car battery method? https://auroragenerators.com/blogs/generators/119728961-fixing-portable-generator-that-have-no-voltage-output Link to comment Share on other sites More sharing options...
Wirejerker Posted July 15, 2018 Share Posted July 15, 2018 I had that problem with an alternator and I disconnected the field wires red and white and connected a battery to the terminals (positive to the terminal with the red wire) for 3 to 5 sec. I did not start the generator at that stage. I reconnected the wires, cover back on then I started the generator. This was enough to put the residual ack into the field pole.I read with interest using an electric drill to energise the field and I can see you need the right type of drill. One with permanent magnets and no speed control.Sent from my iPad using Tapatalk 1 Link to comment Share on other sites More sharing options...
Esso49 Posted July 18, 2018 Author Share Posted July 18, 2018 On 7/15/2018 at 10:09 AM, Esso49 said: Thanks Crossy I'll take it off another day to see if there is any serial numbers etc on it so I can try to get a replacement. Hi Crossy. Tried your link to get an AVR but could not find the exact part number ( 2kw.111018.TT08-3H ). Many look similar and rated for 2-3 kw. Could I get one of those although of course I have no idea if the fixing hole centres will be identical ? Link to comment Share on other sites More sharing options...
Esso49 Posted July 18, 2018 Author Share Posted July 18, 2018 On 7/15/2018 at 4:39 PM, Wirejerker said: I had that problem with an alternator and I disconnected the field wires red and white and connected a battery to the terminals (positive to the terminal with the red wire) for 3 to 5 sec. I did not start the generator at that stage. I reconnected the wires, cover back on then I started the generator. This was enough to put the residual ack into the field pole. I read with interest using an electric drill to energise the field and I can see you need the right type of drill. One with permanent magnets and no speed control. Sent from my iPad using Tapatalk Hi I also tried that. Disconnected all connections from AVR. Connected + from battery terminal to where the red terminal of the AVR was connected and similarly with the neg. terminal. Still no joy so hence with yours and Crossy's help concluded it must be a faulty AVR Link to comment Share on other sites More sharing options...
Crossy Posted July 18, 2018 Share Posted July 18, 2018 4 hours ago, Esso49 said: Could I get one of those although of course I have no idea if the fixing hole centres will be identical ? They're all much of a muchness, something of about the same power rating should do the trick. Link to comment Share on other sites More sharing options...
Crossy Posted July 18, 2018 Share Posted July 18, 2018 A thought. Whilst waiting for your new regulator check if the unit produces AC when you connect the battery to the brushes (engine running of course). Check for the same thing at the AC terminals of the bridge rectifier (output of the exciter winding) and DC at the DC terminals of the bridge. Link to comment Share on other sites More sharing options...
Esso49 Posted July 18, 2018 Author Share Posted July 18, 2018 8 hours ago, Crossy said: They're all much of a muchness, something of about the same power rating should do the trick. Thanks, will try Link to comment Share on other sites More sharing options...
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